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(ModeL) 2 Sheets-Sheet 1'.

' J. A. FIELD.

CORN MILL.

N0. 266 450. Patented Oct. 24, 1882.. fl 5- [2 3 (ModeL) 2 Sheets-Sheet2.

J. A. FIELD.

CORN MILL.

No. 266,450. Patented Oct. 24, 1882'.

- I112 A v J 1; 1%, mm-mxiigifi t yllllilll UNKTED rates ATENT QFFIQEQJAMES A. FIELD, on sr. LOUIS, MIssoUnI.

CORN-MILL.

SPECIFICATION forming part of Letters Patent No. 266,450, dated October24, 1882.

Application filed January 24, 1852.

To all 107mm it may concern:

Be it known that I, JAMES A. FIELD, ot' the city of St. Louis, in theState of Missouri,have invented a certain new and useful Improvement inCorn-Mills, of which the following is a full, clear, and exactdescription, reference being bad to the accompanyingdrawings, formingpart of this specification.

In the drawings, Figure 1 is a perspective view of the mill. Fig. 2 isan axial section of the breaker. Fig. 3 is an enlarged top view of thethroat of the mill, showing the feed-adjusting device between thebreaker and the grinder. Fig. 4 is an enlarged top view of the lowergrinder or runner. Fig.5 is an enlarged bottom view of the upper orfixedgrinder. Fig. 6 is an enlarged top view of the lower part of thebreaker-case, with the top part of same and the hopper removed. Fig.7 isan enlarged side view of the breaker-head, and Fig. 8 a top view of thesame. Fig.9 is an enlarged side view, showing the adjustable attachmentof the upper grinder to the frame. Fig. 10 is a side view of one of theadjusting-blocks shown in Fig. 9, and Fig. 11 is a top view of the same.Fig. 12 is a vertical longitudinal section of the mill on a much largerscale than that shown by the other figures.

The frame is shown atA. B is the bridgetree,one end-of which isadjusted,as usual, by a handnut, O, on the lighter-screw.

D is the spindle, carrying the driving-pulley E and the runnerorlowergrinder, F. The runner is preferably madein annular fornnand fits ahub,D,on the spindle,and is secured thereto by bolts (1, so that it may beremoved when worn out and a new one substituted. On the hub D aregrinding ribs or teeth. The spindle 1) extends up above the grinders andcarries a breaker-head, G, which has curved horns g and ribs g. Thishead is made fast to the spindle, and turns in a case, H, of a turbinateform, having upon its inner side ribs or projections h, which, incombination with the projections gg, act to break the corn-ears intopieces so small as to be suitable for feeding to the grinders. The upperpart, B, of the case H is incurved, as shown, to prevent pieces of thebroken ears from being thrown out of the case by the action of thebreaker.

(Modtll I is the hopper, secured to the top of the case H. The case 11is secured to the top of the upper or fixed grinder, J. Upon the spin- Idle between the runner-hub D and the breaker-headis a feed-collar orstirrer, D clutched to the spindle so as to turn with it. This has clawlike projections d, which prevent the broken corn from lodging in thethroat of the mill. Around the throatare a number of radial slots, inwhich are adjustable slides K, which are moved inward or outward tolessen or increase the size of the throatL to regulate the quantity ofmaterial passing from the breaker to the grinders. These slides aremoved inward and outward by a turn plate or ring, M, having obliqueslots in to receive studs 70 upon the slides. As the ring is turned theslot forces the stud, and with it the slides, simultaneously inward, todecrease the size of the throat, or vice versa, according to thedirection in which the ring is turned. The ring islocked in position bya set-screw, N.

The upper grinder is bolted to an annular plate or spider, 0, whoselower portion, 0, is formed into a circular trough to receive the mealthat escapes from the periphery of the grinders.

0' are lugs whose lower sides have spiral inclines 0 which rest onsimilar inclines of the upper faces,p, of the circular blocks or washersP. The lugs 0 are secured to the top of the frame-uprights by bolts Q.To adjust the upper runner to the lower one, the bolts Q are loosened,and the incline-blocks P may be turned to raise or lower the lugs uponthem.

The breaker-caseis made in two parts, toad- Init of it being castwithout the use of a core, which would otherwiscbe necessary, and whichwould increase the cost of prod uctiou.

The operation is as follows: The cars of corn are placed in the hopper,and the lower ears, coming in contact with the breaker-helm, descend andare broken up into pieces suitable for ieeding to the grinders. Thesepieces pass down through the throat L. In case the feed through thethroat L is too abundant, the ring M is turned to move the slides Kinward, or vice versa.

This device forms a very convenient and accurate means of adjusting thefeed by contracting the throat-aperture equally on every side, and suchadjustment may be made during the running of the mill.

I claim as my invention- 1. The combination ot'spindle D and breaker-head G, mounted thereon, having horns g and ribs 9, with ease H,having ribs or pro jeetions h, grinders 1* J, and throat L intermediateot' breaker and grinders, as set forth.

2. The slides K and means for radially 210- justing the same to regulatethe feed, in combination with and arranged between thebreaker andgrinders, as set forth.

The combination, with the breaking and grinding devices, of the slides Kand obliqne- 15 lyslotted ring M, for the purpose set forth.

JAMES A. FIELD. i Witnesses:

SAML. KNIG-IIT, Gno. H. KNIGHT.

